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use super::{SendDgram, RecvDgram}; use std::io; use std::net::{self, SocketAddr, Ipv4Addr, Ipv6Addr}; use std::fmt; use futures::{Async, Poll}; use mio; use tokio_reactor::{Handle, PollEvented}; /// An I/O object representing a UDP socket. pub struct UdpSocket { io: PollEvented<mio::net::UdpSocket>, } impl UdpSocket { /// This function will create a new UDP socket and attempt to bind it to /// the `addr` provided. pub fn bind(addr: &SocketAddr) -> io::Result<UdpSocket> { mio::net::UdpSocket::bind(addr) .map(UdpSocket::new) } fn new(socket: mio::net::UdpSocket) -> UdpSocket { let io = PollEvented::new(socket); UdpSocket { io: io } } /// Creates a new `UdpSocket` from the previously bound socket provided. /// /// The socket given will be registered with the event loop that `handle` /// is associated with. This function requires that `socket` has previously /// been bound to an address to work correctly. /// /// This can be used in conjunction with net2's `UdpBuilder` interface to /// configure a socket before it's handed off, such as setting options like /// `reuse_address` or binding to multiple addresses. /// /// Use `Handle::default()` to lazily bind to an event loop, just like `bind` does. pub fn from_std(socket: net::UdpSocket, handle: &Handle) -> io::Result<UdpSocket> { let io = mio::net::UdpSocket::from_socket(socket)?; let io = PollEvented::new_with_handle(io, handle)?; Ok(UdpSocket { io }) } /// Returns the local address that this socket is bound to. pub fn local_addr(&self) -> io::Result<SocketAddr> { self.io.get_ref().local_addr() } /// Connects the UDP socket setting the default destination for send() and /// limiting packets that are read via recv from the address specified in /// `addr`. pub fn connect(&self, addr: &SocketAddr) -> io::Result<()> { self.io.get_ref().connect(*addr) } #[deprecated(since = "0.1.2", note = "use poll_send instead")] #[doc(hidden)] pub fn send(&mut self, buf: &[u8]) -> io::Result<usize> { match self.poll_send(buf)? { Async::Ready(n) => Ok(n), Async::NotReady => Err(io::ErrorKind::WouldBlock.into()), } } /// Sends data on the socket to the remote address to which it is connected. /// /// The [`connect`] method will connect this socket to a remote address. This /// method will fail if the socket is not connected. /// /// [`connect`]: #method.connect /// /// # Return /// /// On success, returns `Ok(Async::Ready(num_bytes_written))`. /// /// If the socket is not ready for writing, the method returns /// `Ok(Async::NotReady)` and arranges for the current task to receive a /// notification when the socket becomes writable. /// /// # Panics /// /// This function will panic if called from outside of a task context. pub fn poll_send(&mut self, buf: &[u8]) -> Poll<usize, io::Error> { try_ready!(self.io.poll_write_ready()); match self.io.get_ref().send(buf) { Ok(n) => Ok(n.into()), Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => { self.io.clear_write_ready()?; Ok(Async::NotReady) } Err(e) => Err(e), } } #[deprecated(since = "0.1.2", note = "use poll_recv instead")] #[doc(hidden)] pub fn recv(&mut self, buf: &mut [u8]) -> io::Result<usize> { match self.poll_recv(buf)? { Async::Ready(n) => Ok(n), Async::NotReady => Err(io::ErrorKind::WouldBlock.into()), } } /// Receives a single datagram message on the socket from the remote address to /// which it is connected. On success, returns the number of bytes read. /// /// The function must be called with valid byte array `buf` of sufficient size to /// hold the message bytes. If a message is too long to fit in the supplied buffer, /// excess bytes may be discarded. /// /// The [`connect`] method will connect this socket to a remote address. This /// method will fail if the socket is not connected. /// /// [`connect`]: #method.connect /// /// # Return /// /// On success, returns `Ok(Async::Ready(num_bytes_read))`. /// /// If no data is available for reading, the method returns /// `Ok(Async::NotReady)` and arranges for the current task to receive a /// notification when the socket becomes receivable or is closed. /// /// # Panics /// /// This function will panic if called from outside of a task context. pub fn poll_recv(&mut self, buf: &mut [u8]) -> Poll<usize, io::Error> { try_ready!(self.io.poll_read_ready(mio::Ready::readable())); match self.io.get_ref().recv(buf) { Ok(n) => Ok(n.into()), Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => { self.io.clear_read_ready(mio::Ready::readable())?; Ok(Async::NotReady) } Err(e) => Err(e), } } #[deprecated(since = "0.1.2", note = "use poll_send_to instead")] #[doc(hidden)] pub fn send_to(&mut self, buf: &[u8], target: &SocketAddr) -> io::Result<usize> { match self.poll_send_to(buf, target)? { Async::Ready(n) => Ok(n), Async::NotReady => Err(io::ErrorKind::WouldBlock.into()), } } /// Sends data on the socket to the given address. On success, returns the /// number of bytes written. /// /// This will return an error when the IP version of the local socket /// does not match that of `target`. /// /// # Return /// /// On success, returns `Ok(Async::Ready(num_bytes_written))`. /// /// If the socket is not ready for writing, the method returns /// `Ok(Async::NotReady)` and arranges for the current task to receive a /// notification when the socket becomes writable. /// /// # Panics /// /// This function will panic if called from outside of a task context. pub fn poll_send_to(&mut self, buf: &[u8], target: &SocketAddr) -> Poll<usize, io::Error> { try_ready!(self.io.poll_write_ready()); match self.io.get_ref().send_to(buf, target) { Ok(n) => Ok(n.into()), Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => { self.io.clear_write_ready()?; Ok(Async::NotReady) } Err(e) => Err(e), } } /// Creates a future that will write the entire contents of the buffer /// `buf` provided as a datagram to this socket. /// /// The returned future will return after data has been written to the /// outbound socket. The future will resolve to the stream as well as the /// buffer (for reuse if needed). /// /// Any error which happens during writing will cause both the stream and /// the buffer to get destroyed. Note that failure to write the entire /// buffer is considered an error for the purposes of sending a datagram. /// /// The `buf` parameter here only requires the `AsRef<[u8]>` trait, which /// should be broadly applicable to accepting data which can be converted /// to a slice. pub fn send_dgram<T>(self, buf: T, addr: &SocketAddr) -> SendDgram<T> where T: AsRef<[u8]>, { SendDgram::new(self, buf, *addr) } #[deprecated(since = "0.1.2", note = "use poll_recv_from instead")] #[doc(hidden)] pub fn recv_from(&mut self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> { match self.poll_recv_from(buf)? { Async::Ready(ret) => Ok(ret), Async::NotReady => Err(io::ErrorKind::WouldBlock.into()), } } /// Receives data from the socket. On success, returns the number of bytes /// read and the address from whence the data came. /// /// # Panics /// /// This function will panic if called outside the context of a future's /// task. pub fn poll_recv_from(&mut self, buf: &mut [u8]) -> Poll<(usize, SocketAddr), io::Error> { try_ready!(self.io.poll_read_ready(mio::Ready::readable())); match self.io.get_ref().recv_from(buf) { Ok(n) => Ok(n.into()), Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => { self.io.clear_read_ready(mio::Ready::readable())?; Ok(Async::NotReady) } Err(e) => Err(e), } } /// Creates a future that receive a datagram to be written to the buffer /// provided. /// /// The returned future will return after a datagram has been received on /// this socket. The future will resolve to the socket, the buffer, the /// amount of data read, and the address the data was received from. /// /// An error during reading will cause the socket and buffer to get /// destroyed. /// /// The `buf` parameter here only requires the `AsMut<[u8]>` trait, which /// should be broadly applicable to accepting data which can be converted /// to a slice. pub fn recv_dgram<T>(self, buf: T) -> RecvDgram<T> where T: AsMut<[u8]>, { RecvDgram::new(self, buf) } /// Gets the value of the `SO_BROADCAST` option for this socket. /// /// For more information about this option, see [`set_broadcast`]. /// /// [`set_broadcast`]: #method.set_broadcast pub fn broadcast(&self) -> io::Result<bool> { self.io.get_ref().broadcast() } /// Sets the value of the `SO_BROADCAST` option for this socket. /// /// When enabled, this socket is allowed to send packets to a broadcast /// address. pub fn set_broadcast(&self, on: bool) -> io::Result<()> { self.io.get_ref().set_broadcast(on) } /// Gets the value of the `IP_MULTICAST_LOOP` option for this socket. /// /// For more information about this option, see [`set_multicast_loop_v4`]. /// /// [`set_multicast_loop_v4`]: #method.set_multicast_loop_v4 pub fn multicast_loop_v4(&self) -> io::Result<bool> { self.io.get_ref().multicast_loop_v4() } /// Sets the value of the `IP_MULTICAST_LOOP` option for this socket. /// /// If enabled, multicast packets will be looped back to the local socket. /// /// # Note /// /// This may not have any affect on IPv6 sockets. pub fn set_multicast_loop_v4(&self, on: bool) -> io::Result<()> { self.io.get_ref().set_multicast_loop_v4(on) } /// Gets the value of the `IP_MULTICAST_TTL` option for this socket. /// /// For more information about this option, see [`set_multicast_ttl_v4`]. /// /// [`set_multicast_ttl_v4`]: #method.set_multicast_ttl_v4 pub fn multicast_ttl_v4(&self) -> io::Result<u32> { self.io.get_ref().multicast_ttl_v4() } /// Sets the value of the `IP_MULTICAST_TTL` option for this socket. /// /// Indicates the time-to-live value of outgoing multicast packets for /// this socket. The default value is 1 which means that multicast packets /// don't leave the local network unless explicitly requested. /// /// # Note /// /// This may not have any affect on IPv6 sockets. pub fn set_multicast_ttl_v4(&self, ttl: u32) -> io::Result<()> { self.io.get_ref().set_multicast_ttl_v4(ttl) } /// Gets the value of the `IPV6_MULTICAST_LOOP` option for this socket. /// /// For more information about this option, see [`set_multicast_loop_v6`]. /// /// [`set_multicast_loop_v6`]: #method.set_multicast_loop_v6 pub fn multicast_loop_v6(&self) -> io::Result<bool> { self.io.get_ref().multicast_loop_v6() } /// Sets the value of the `IPV6_MULTICAST_LOOP` option for this socket. /// /// Controls whether this socket sees the multicast packets it sends itself. /// /// # Note /// /// This may not have any affect on IPv4 sockets. pub fn set_multicast_loop_v6(&self, on: bool) -> io::Result<()> { self.io.get_ref().set_multicast_loop_v6(on) } /// Gets the value of the `IP_TTL` option for this socket. /// /// For more information about this option, see [`set_ttl`]. /// /// [`set_ttl`]: #method.set_ttl pub fn ttl(&self) -> io::Result<u32> { self.io.get_ref().ttl() } /// Sets the value for the `IP_TTL` option on this socket. /// /// This value sets the time-to-live field that is used in every packet sent /// from this socket. pub fn set_ttl(&self, ttl: u32) -> io::Result<()> { self.io.get_ref().set_ttl(ttl) } /// Executes an operation of the `IP_ADD_MEMBERSHIP` type. /// /// This function specifies a new multicast group for this socket to join. /// The address must be a valid multicast address, and `interface` is the /// address of the local interface with which the system should join the /// multicast group. If it's equal to `INADDR_ANY` then an appropriate /// interface is chosen by the system. pub fn join_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()> { self.io.get_ref().join_multicast_v4(multiaddr, interface) } /// Executes an operation of the `IPV6_ADD_MEMBERSHIP` type. /// /// This function specifies a new multicast group for this socket to join. /// The address must be a valid multicast address, and `interface` is the /// index of the interface to join/leave (or 0 to indicate any interface). pub fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> { self.io.get_ref().join_multicast_v6(multiaddr, interface) } /// Executes an operation of the `IP_DROP_MEMBERSHIP` type. /// /// For more information about this option, see [`join_multicast_v4`]. /// /// [`join_multicast_v4`]: #method.join_multicast_v4 pub fn leave_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()> { self.io.get_ref().leave_multicast_v4(multiaddr, interface) } /// Executes an operation of the `IPV6_DROP_MEMBERSHIP` type. /// /// For more information about this option, see [`join_multicast_v6`]. /// /// [`join_multicast_v6`]: #method.join_multicast_v6 pub fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> { self.io.get_ref().leave_multicast_v6(multiaddr, interface) } } impl fmt::Debug for UdpSocket { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.io.get_ref().fmt(f) } } #[cfg(all(unix))] mod sys { use std::os::unix::prelude::*; use super::UdpSocket; impl AsRawFd for UdpSocket { fn as_raw_fd(&self) -> RawFd { self.io.get_ref().as_raw_fd() } } } #[cfg(windows)] mod sys { // TODO: let's land these upstream with mio and then we can add them here. // // use std::os::windows::prelude::*; // use super::UdpSocket; // // impl AsRawHandle for UdpSocket { // fn as_raw_handle(&self) -> RawHandle { // self.io.get_ref().as_raw_handle() // } // } }